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Added OpenGL 2.1 as a graphics backend

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This commit is contained in:
Yousef Khadadeh 2025-08-09 10:45:39 +03:00
parent ca0a04bf1d
commit 33a03a382b
7 changed files with 6787 additions and 2204 deletions
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33
src/main.cpp
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@ -7,10 +7,15 @@
#include <filesystem>
#ifdef USE_BACKEND_OPENGL
#ifndef __EMSCRIPTEN__
#ifdef USING_OPENGLES
#include <glad/gles2.h>
#ifdef USE_BACKEND_OPENGLES_3_0
#define GLAD_GLES2_IMPLEMENTATION
#include <glad/gles3_0.h>
#elif USE_BACKEND_OPENGL_2_1
#define GLAD_GL_IMPLEMENTATION
#include <glad/gl2_1.h>
#else
#include <glad/gl.h>
#define GLAD_GL_IMPLEMENTATION
#include <glad/gl3_3.h>
#endif
#endif
#endif
@ -170,13 +175,13 @@ void initialize_sdl(MainStruct& mS, int wWidth, int wHeight) {
window_flags |= SDL_WINDOW_OPENGL;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
#ifdef __EMSCRIPTEN__
#if defined(__EMSCRIPTEN__) || defined(USE_BACKEND_OPENGLES_3_0)
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#elif USING_OPENGLES
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
#elif defined(USE_BACKEND_OPENGL_2_1)
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_COMPATIBILITY);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
#else
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
@ -216,14 +221,22 @@ void initialize_sdl(MainStruct& mS, int wWidth, int wHeight) {
SDL_GL_MakeCurrent(mS.window, mS.gl_context);
#ifndef __EMSCRIPTEN__
#ifdef USING_OPENGLES
#ifdef USE_BACKEND_OPENGLES_3_0
if(!gladLoadGLES2(SDL_GL_GetProcAddress))
throw std::runtime_error("[gladLoadGLES2] Failed to load GLAD OpenGLES 3.1 Loader");
throw std::runtime_error("[gladLoadGLES2] Failed to load GLAD OpenGLES 3.0 Loader");
#elif defined(USE_BACKEND_OPENGL_2_1)
if(!gladLoadGL(SDL_GL_GetProcAddress))
throw std::runtime_error("[gladLoadGL] Failed to load GLAD OpenGL 2.1 Loader");
#else
if(!gladLoadGL(SDL_GL_GetProcAddress))
throw std::runtime_error("[gladLoadGL] Failed to load GLAD OpenGL 3.3 Loader");
#endif
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &mS.defaultFBO);
#ifndef USE_BACKEND_OPENGL_2_1
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &mS.defaultFBO);
#endif
Logger::get().log("INFO", "GL Version: " + std::string(reinterpret_cast<const char*>(glGetString(GL_VERSION))));
#endif